﻿using System;

namespace Mark.Common
{
	/// <summary> 
	/// Rmb 小写转大写类 
	/// </summary> 
	public class Rmb
	{
		/// <summary> 
		/// 转换人民币大小金额 
		/// </summary> 
		/// <param name="num">金额</param> 
		/// <returns>返回大写形式</returns> 
		public static string CmycurD(decimal num)
		{
			string str1 = "零壹贰叁肆伍陆柒捌玖";            //0-9所对应的汉字 
			string str2 = "万仟佰拾亿仟佰拾万仟佰拾元角分"; //数字位所对应的汉字 
			string str3 = "";    //从原num值中取出的值 
			string str4 = "";    //数字的字符串形式 
			string str5 = "";  //人民币大写金额形式 
			int i;    //循环变量 
			int j;    //num的值乘以100的字符串长度 
			string ch1 = "";    //数字的汉语读法 
			string ch2 = "";    //数字位的汉字读法 
			int nzero = 0;  //用来计算连续的零值是几个 
			int temp;            //从原num值中取出的值 

			num = Math.Round(Math.Abs(num), 2);    //将num取绝对值并四舍五入取2位小数 
			str4 = ((long)(num * 100)).ToString();        //将num乘100并转换成字符串形式 
			j = str4.Length;      //找出最高位 
			if (j > 15) { return "溢出"; }
			str2 = str2.Substring(15 - j);   //取出对应位数的str2的值。如：200.55,j为5所以str2=佰拾元角分 

			//循环取出每一位需要转换的值 
			for (i = 0; i < j; i++)
			{
				str3 = str4.Substring(i, 1);          //取出需转换的某一位的值 
				temp = Convert.ToInt32(str3);      //转换为数字 
				if (i != (j - 3) && i != (j - 7) && i != (j - 11) && i != (j - 15))
				{
					//当所取位数不为元、万、亿、万亿上的数字时 
					if (str3 == "0")
					{
						ch1 = "";
						ch2 = "";
						nzero = nzero + 1;
					}
					else
					{
						if (str3 != "0" && nzero != 0)
						{
							ch1 = "零" + str1.Substring(temp * 1, 1);
							ch2 = str2.Substring(i, 1);
							nzero = 0;
						}
						else
						{
							ch1 = str1.Substring(temp * 1, 1);
							ch2 = str2.Substring(i, 1);
							nzero = 0;
						}
					}
				}
				else
				{
					//该位是万亿，亿，万，元位等关键位 
					if (str3 != "0" && nzero != 0)
					{
						ch1 = "零" + str1.Substring(temp * 1, 1);
						ch2 = str2.Substring(i, 1);
						nzero = 0;
					}
					else
					{
						if (str3 != "0" && nzero == 0)
						{
							ch1 = str1.Substring(temp * 1, 1);
							ch2 = str2.Substring(i, 1);
							nzero = 0;
						}
						else
						{
							if (str3 == "0" && nzero >= 3)
							{
								ch1 = "";
								ch2 = "";
								nzero = nzero + 1;
							}
							else
							{
								if (j >= 11)
								{
									ch1 = "";
									nzero = nzero + 1;
								}
								else
								{
									ch1 = "";
									ch2 = str2.Substring(i, 1);
									nzero = nzero + 1;
								}
							}
						}
					}
				}
				if (i == (j - 11) || i == (j - 3))
				{
					//如果该位是亿位或元位，则必须写上 
					ch2 = str2.Substring(i, 1);
				}
				str5 = str5 + ch1 + ch2;

				if (i == j - 1 && str3 == "0")
				{
					//最后一位（分）为0时，加上“整” 
					str5 = str5 + '整';
				}
			}
			if (num == 0)
			{
				str5 = "零元整";
			}
			return str5;
		}

		/**/
		/// <summary> 
		/// 一个重载，将字符串先转换成数字在调用CmycurD(decimal num) 
		/// </summary> 
		/// <param name="num">用户输入的金额，字符串形式未转成decimal</param> 
		/// <returns></returns> 
		public static string CmycurD(string numstr)
		{
			try
			{
				decimal num = Convert.ToDecimal(numstr);
				return CmycurD(num);
			}
			catch
			{
				return "非数字形式！";
			}
		}
	} 
}
